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vi_mode.c
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/* vi_mode.c -- A vi emulation mode for Bash.
Derived from code written by Jeff Sparkes ([email protected]). */
/* Copyright (C) 1987-2018 Free Software Foundation, Inc.
This file is part of the GNU Readline Library (Readline), a library
for reading lines of text with interactive input and history editing.
Readline is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
Readline is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with Readline. If not, see <http://www.gnu.org/licenses/>.
*/
#define READLINE_LIBRARY
/* **************************************************************** */
/* */
/* VI Emulation Mode */
/* */
/* **************************************************************** */
#include "rlconf.h"
#if defined (VI_MODE)
#if defined (HAVE_CONFIG_H)
# include <config.h>
#endif
#include <sys/types.h>
#if defined (HAVE_STDLIB_H)
# include <stdlib.h>
#else
# include "ansi_stdlib.h"
#endif /* HAVE_STDLIB_H */
#if defined (HAVE_UNISTD_H)
# include <unistd.h>
#endif
#include <stdio.h>
/* Some standard library routines. */
#include "rldefs.h"
#include "rlmbutil.h"
#include "readline.h"
#include "history.h"
#include "rlprivate.h"
#include "xmalloc.h"
#ifndef member
#define member(c, s) ((c) ? (char *)strchr ((s), (c)) != (char *)NULL : 0)
#endif
/* Increment START to the next character in RL_LINE_BUFFER, handling multibyte chars */
#if defined (HANDLE_MULTIBYTE)
#define INCREMENT_POS(start) \
do { \
if (MB_CUR_MAX == 1 || rl_byte_oriented) \
start++; \
else \
start = _rl_find_next_mbchar (rl_line_buffer, start, 1, MB_FIND_ANY); \
} while (0)
#else /* !HANDLE_MULTIBYTE */
#define INCREMENT_POS(start) (start)++
#endif /* !HANDLE_MULTIBYTE */
/* This is global so other parts of the code can check whether the last
command was a text modification command. */
int _rl_vi_last_command = 'i'; /* default `.' puts you in insert mode */
_rl_vimotion_cxt *_rl_vimvcxt = 0;
/* Non-zero indicates we are redoing a vi-mode command with `.' */
int _rl_vi_redoing;
/* Non-zero means enter insertion mode. */
static int _rl_vi_doing_insert;
/* Command keys which do movement for xxx_to commands. */
static const char * const vi_motion = " hl^$0ftFT;,%wbeWBE|`";
/* Keymap used for vi replace characters. Created dynamically since
rarely used. */
static Keymap vi_replace_map;
/* The number of characters inserted in the last replace operation. */
static int vi_replace_count;
/* If non-zero, we have text inserted after a c[motion] command that put
us implicitly into insert mode. Some people want this text to be
attached to the command so that it is `redoable' with `.'. */
static int vi_continued_command;
static char *vi_insert_buffer;
static int vi_insert_buffer_size;
static int _rl_vi_last_repeat = 1;
static int _rl_vi_last_arg_sign = 1;
static int _rl_vi_last_motion;
#if defined (HANDLE_MULTIBYTE)
static char _rl_vi_last_search_mbchar[MB_LEN_MAX];
static int _rl_vi_last_search_mblen;
#else
static int _rl_vi_last_search_char;
#endif
static char _rl_vi_last_replacement[MB_LEN_MAX+1]; /* reserve for trailing NULL */
static int _rl_vi_last_key_before_insert;
/* Text modification commands. These are the `redoable' commands. */
static const char * const vi_textmod = "_*\\AaIiCcDdPpYyRrSsXx~";
/* Arrays for the saved marks. */
static int vi_mark_chars['z' - 'a' + 1];
static void _rl_vi_replace_insert PARAMS((int));
static void _rl_vi_save_replace PARAMS((void));
static void _rl_vi_stuff_insert PARAMS((int));
static void _rl_vi_save_insert PARAMS((UNDO_LIST *));
static void vi_save_insert_buffer PARAMS ((int, int));
static inline void _rl_vi_backup PARAMS((void));
static int _rl_vi_arg_dispatch PARAMS((int));
static int rl_digit_loop1 PARAMS((void));
static int _rl_vi_set_mark PARAMS((void));
static int _rl_vi_goto_mark PARAMS((void));
static inline int _rl_vi_advance_point PARAMS((void));
static inline int _rl_vi_backup_point PARAMS((void));
static void _rl_vi_append_forward PARAMS((int));
static int _rl_vi_callback_getchar PARAMS((char *, int));
#if defined (READLINE_CALLBACKS)
static int _rl_vi_callback_set_mark PARAMS((_rl_callback_generic_arg *));
static int _rl_vi_callback_goto_mark PARAMS((_rl_callback_generic_arg *));
static int _rl_vi_callback_change_char PARAMS((_rl_callback_generic_arg *));
static int _rl_vi_callback_char_search PARAMS((_rl_callback_generic_arg *));
#endif
static int rl_domove_read_callback PARAMS((_rl_vimotion_cxt *));
static int rl_domove_motion_callback PARAMS((_rl_vimotion_cxt *));
static int rl_vi_domove_getchar PARAMS((_rl_vimotion_cxt *));
static int vi_change_dispatch PARAMS((_rl_vimotion_cxt *));
static int vi_delete_dispatch PARAMS((_rl_vimotion_cxt *));
static int vi_yank_dispatch PARAMS((_rl_vimotion_cxt *));
static int vidomove_dispatch PARAMS((_rl_vimotion_cxt *));
void
_rl_vi_initialize_line (void)
{
register int i, n;
n = sizeof (vi_mark_chars) / sizeof (vi_mark_chars[0]);
for (i = 0; i < n; i++)
vi_mark_chars[i] = -1;
RL_UNSETSTATE(RL_STATE_VICMDONCE);
}
void
_rl_vi_reset_last (void)
{
_rl_vi_last_command = 'i';
_rl_vi_last_repeat = 1;
_rl_vi_last_arg_sign = 1;
_rl_vi_last_motion = 0;
}
void
_rl_vi_set_last (int key, int repeat, int sign)
{
_rl_vi_last_command = key;
_rl_vi_last_repeat = repeat;
_rl_vi_last_arg_sign = sign;
}
/* A convenience function that calls _rl_vi_set_last to save the last command
information and enters insertion mode. */
void
rl_vi_start_inserting (int key, int repeat, int sign)
{
_rl_vi_set_last (key, repeat, sign);
rl_begin_undo_group (); /* ensure inserts aren't concatenated */
rl_vi_insertion_mode (1, key);
}
/* Is the command C a VI mode text modification command? */
int
_rl_vi_textmod_command (int c)
{
return (member (c, vi_textmod));
}
int
_rl_vi_motion_command (int c)
{
return (member (c, vi_motion));
}
static void
_rl_vi_replace_insert (int count)
{
int nchars;
nchars = strlen (vi_insert_buffer);
rl_begin_undo_group ();
while (count--)
/* nchars-1 to compensate for _rl_replace_text using `end+1' in call
to rl_delete_text */
_rl_replace_text (vi_insert_buffer, rl_point, rl_point+nchars-1);
rl_end_undo_group ();
}
static void
_rl_vi_stuff_insert (int count)
{
rl_begin_undo_group ();
while (count--)
rl_insert_text (vi_insert_buffer);
rl_end_undo_group ();
}
/* Bound to `.'. Called from command mode, so we know that we have to
redo a text modification command. The default for _rl_vi_last_command
puts you back into insert mode. */
int
rl_vi_redo (int count, int c)
{
int r;
if (rl_explicit_arg == 0)
{
rl_numeric_arg = _rl_vi_last_repeat;
rl_arg_sign = _rl_vi_last_arg_sign;
}
r = 0;
_rl_vi_redoing = 1;
/* If we're redoing an insert with `i', stuff in the inserted text
and do not go into insertion mode. */
if (_rl_vi_last_command == 'i' && vi_insert_buffer && *vi_insert_buffer)
{
_rl_vi_stuff_insert (count);
/* And back up point over the last character inserted. */
if (rl_point > 0)
_rl_vi_backup ();
}
else if (_rl_vi_last_command == 'R' && vi_insert_buffer && *vi_insert_buffer)
{
_rl_vi_replace_insert (count);
/* And back up point over the last character inserted. */
if (rl_point > 0)
_rl_vi_backup ();
}
/* Ditto for redoing an insert with `I', but move to the beginning of the
line like the `I' command does. */
else if (_rl_vi_last_command == 'I' && vi_insert_buffer && *vi_insert_buffer)
{
rl_beg_of_line (1, 'I');
_rl_vi_stuff_insert (count);
if (rl_point > 0)
_rl_vi_backup ();
}
/* Ditto for redoing an insert with `a', but move forward a character first
like the `a' command does. */
else if (_rl_vi_last_command == 'a' && vi_insert_buffer && *vi_insert_buffer)
{
_rl_vi_append_forward ('a');
_rl_vi_stuff_insert (count);
if (rl_point > 0)
_rl_vi_backup ();
}
/* Ditto for redoing an insert with `A', but move to the end of the line
like the `A' command does. */
else if (_rl_vi_last_command == 'A' && vi_insert_buffer && *vi_insert_buffer)
{
rl_end_of_line (1, 'A');
_rl_vi_stuff_insert (count);
if (rl_point > 0)
_rl_vi_backup ();
}
else
r = _rl_dispatch (_rl_vi_last_command, _rl_keymap);
_rl_vi_redoing = 0;
return (r);
}
/* A placeholder for further expansion. */
int
rl_vi_undo (int count, int key)
{
return (rl_undo_command (count, key));
}
/* Yank the nth arg from the previous line into this line at point. */
int
rl_vi_yank_arg (int count, int key)
{
/* Readline thinks that the first word on a line is the 0th, while vi
thinks the first word on a line is the 1st. Compensate. */
if (rl_explicit_arg)
rl_yank_nth_arg (count - 1, 0);
else
rl_yank_nth_arg ('$', 0);
return (0);
}
/* With an argument, move back that many history lines, else move to the
beginning of history. */
int
rl_vi_fetch_history (int count, int c)
{
int wanted;
/* Giving an argument of n means we want the nth command in the history
file. The command number is interpreted the same way that the bash
`history' command does it -- that is, giving an argument count of 450
to this command would get the command listed as number 450 in the
output of `history'. */
if (rl_explicit_arg)
{
wanted = history_base + where_history () - count;
if (wanted <= 0)
rl_beginning_of_history (0, 0);
else
rl_get_previous_history (wanted, c);
}
else
rl_beginning_of_history (count, 0);
return (0);
}
/* Search again for the last thing searched for. */
int
rl_vi_search_again (int count, int key)
{
switch (key)
{
case 'n':
rl_noninc_reverse_search_again (count, key);
break;
case 'N':
rl_noninc_forward_search_again (count, key);
break;
}
return (0);
}
/* Do a vi style search. */
int
rl_vi_search (int count, int key)
{
switch (key)
{
case '?':
_rl_free_saved_history_line ();
rl_noninc_forward_search (count, key);
break;
case '/':
_rl_free_saved_history_line ();
rl_noninc_reverse_search (count, key);
break;
default:
rl_ding ();
break;
}
return (0);
}
/* Completion, from vi's point of view. */
int
rl_vi_complete (int ignore, int key)
{
if ((rl_point < rl_end) && (!whitespace (rl_line_buffer[rl_point])))
{
if (!whitespace (rl_line_buffer[rl_point + 1]))
rl_vi_end_word (1, 'E');
_rl_vi_advance_point ();
}
if (key == '*')
rl_complete_internal ('*'); /* Expansion and replacement. */
else if (key == '=')
rl_complete_internal ('?'); /* List possible completions. */
else if (key == '\\')
rl_complete_internal (TAB); /* Standard Readline completion. */
else
rl_complete (0, key);
if (key == '*' || key == '\\')
rl_vi_start_inserting (key, 1, rl_arg_sign);
return (0);
}
/* Tilde expansion for vi mode. */
int
rl_vi_tilde_expand (int ignore, int key)
{
rl_tilde_expand (0, key);
rl_vi_start_inserting (key, 1, rl_arg_sign);
return (0);
}
/* Previous word in vi mode. */
int
rl_vi_prev_word (int count, int key)
{
if (count < 0)
return (rl_vi_next_word (-count, key));
if (rl_point == 0)
{
rl_ding ();
return (0);
}
if (_rl_uppercase_p (key))
rl_vi_bWord (count, key);
else
rl_vi_bword (count, key);
return (0);
}
/* Next word in vi mode. */
int
rl_vi_next_word (int count, int key)
{
if (count < 0)
return (rl_vi_prev_word (-count, key));
if (rl_point >= (rl_end - 1))
{
rl_ding ();
return (0);
}
if (_rl_uppercase_p (key))
rl_vi_fWord (count, key);
else
rl_vi_fword (count, key);
return (0);
}
static inline int
_rl_vi_advance_point (void)
{
int point;
point = rl_point;
if (rl_point < rl_end)
#if defined (HANDLE_MULTIBYTE)
{
if (MB_CUR_MAX == 1 || rl_byte_oriented)
rl_point++;
else
{
point = rl_point;
rl_point = _rl_forward_char_internal (1);
if (point == rl_point || rl_point > rl_end)
rl_point = rl_end;
}
}
#else
rl_point++;
#endif
return point;
}
/* Move the cursor back one character. */
static inline void
_rl_vi_backup (void)
{
if (MB_CUR_MAX > 1 && rl_byte_oriented == 0)
rl_point = _rl_find_prev_mbchar (rl_line_buffer, rl_point, MB_FIND_NONZERO);
else
rl_point--;
}
/* Move the point back one character, returning the starting value and not
doing anything at the beginning of the line */
static inline int
_rl_vi_backup_point (void)
{
int point;
point = rl_point;
if (rl_point > 0)
#if defined (HANDLE_MULTIBYTE)
{
if (MB_CUR_MAX == 1 || rl_byte_oriented)
rl_point--;
else
{
point = rl_point;
rl_point = _rl_backward_char_internal (1);
if (rl_point < 0)
rl_point = 0; /* XXX - not really necessary */
}
}
#else
rl_point--;
#endif
return point;
}
/* Move to the end of the ?next? word. */
int
rl_vi_end_word (int count, int key)
{
if (count < 0)
{
rl_ding ();
return 1;
}
if (_rl_uppercase_p (key))
rl_vi_eWord (count, key);
else
rl_vi_eword (count, key);
return (0);
}
/* Move forward a word the way that 'W' does. */
int
rl_vi_fWord (int count, int ignore)
{
while (count-- && rl_point < (rl_end - 1))
{
/* Skip until whitespace. */
while (!whitespace (rl_line_buffer[rl_point]) && rl_point < rl_end)
_rl_vi_advance_point ();
/* Now skip whitespace. */
while (whitespace (rl_line_buffer[rl_point]) && rl_point < rl_end)
_rl_vi_advance_point ();
}
return (0);
}
int
rl_vi_bWord (int count, int ignore)
{
while (count-- && rl_point > 0)
{
/* If we are at the start of a word, move back to whitespace so
we will go back to the start of the previous word. */
if (!whitespace (rl_line_buffer[rl_point]) &&
whitespace (rl_line_buffer[rl_point - 1]))
rl_point--;
while (rl_point > 0 && whitespace (rl_line_buffer[rl_point]))
_rl_vi_backup_point ();
if (rl_point > 0)
{
do
_rl_vi_backup_point ();
while (rl_point > 0 && !whitespace (rl_line_buffer[rl_point]));
if (rl_point > 0) /* hit whitespace */
rl_point++;
if (rl_point < 0)
rl_point = 0;
}
}
return (0);
}
int
rl_vi_eWord (int count, int ignore)
{
int opoint;
while (count-- && rl_point < (rl_end - 1))
{
if (whitespace (rl_line_buffer[rl_point]) == 0)
_rl_vi_advance_point ();
/* Move to the next non-whitespace character (to the start of the
next word). */
while (rl_point < rl_end && whitespace (rl_line_buffer[rl_point]))
_rl_vi_advance_point ();
if (rl_point && rl_point < rl_end)
{
opoint = rl_point;
/* Skip whitespace. */
while (rl_point < rl_end && whitespace (rl_line_buffer[rl_point]))
opoint = _rl_vi_advance_point (); /* XXX - why? */
/* Skip until whitespace. */
while (rl_point < rl_end && !whitespace (rl_line_buffer[rl_point]))
opoint = _rl_vi_advance_point ();
/* Move back to the last character of the word. */
rl_point = opoint;
}
}
return (0);
}
int
rl_vi_fword (int count, int ignore)
{
int opoint;
while (count-- && rl_point < (rl_end - 1))
{
/* Move to white space (really non-identifer). */
if (_rl_isident (rl_line_buffer[rl_point]))
{
while (_rl_isident (rl_line_buffer[rl_point]) && rl_point < rl_end)
_rl_vi_advance_point ();
}
else /* if (!whitespace (rl_line_buffer[rl_point])) */
{
while (!_rl_isident (rl_line_buffer[rl_point]) &&
!whitespace (rl_line_buffer[rl_point]) && rl_point < rl_end)
_rl_vi_advance_point ();
}
opoint = rl_point;
/* Move past whitespace. */
while (whitespace (rl_line_buffer[rl_point]) && rl_point < rl_end)
opoint = _rl_vi_advance_point ();
}
return (0);
}
int
rl_vi_bword (int count, int ignore)
{
int opoint;
while (count-- && rl_point > 0)
{
int prev_is_ident, cur_is_ident;
/* If we are at the start of a word, move back to whitespace
so we will go back to the start of the previous word. */
if (!whitespace (rl_line_buffer[rl_point]) &&
whitespace (rl_line_buffer[rl_point - 1]))
if (--rl_point == 0)
break;
/* If this character and the previous character are `opposite', move
back so we don't get messed up by the rl_point++ down there in
the while loop. Without this code, words like `l;' screw up the
function. */
cur_is_ident = _rl_isident (rl_line_buffer[rl_point]);
opoint = _rl_vi_backup_point ();
prev_is_ident = _rl_isident (rl_line_buffer[rl_point]);
if ((cur_is_ident && !prev_is_ident) || (!cur_is_ident && prev_is_ident))
; /* leave point alone, we backed it up one character */
else
rl_point = opoint;
while (rl_point > 0 && whitespace (rl_line_buffer[rl_point]))
_rl_vi_backup_point ();
if (rl_point > 0)
{
opoint = rl_point;
if (_rl_isident (rl_line_buffer[rl_point]))
do
opoint = _rl_vi_backup_point ();
while (rl_point > 0 && _rl_isident (rl_line_buffer[rl_point]));
else
do
opoint = _rl_vi_backup_point ();
while (rl_point > 0 && !_rl_isident (rl_line_buffer[rl_point]) &&
!whitespace (rl_line_buffer[rl_point]));
if (rl_point > 0)
rl_point = opoint;
if (rl_point < 0)
rl_point = 0;
}
}
return (0);
}
int
rl_vi_eword (int count, int ignore)
{
int opoint;
while (count-- && rl_point < (rl_end - 1))
{
if (whitespace (rl_line_buffer[rl_point]) == 0)
_rl_vi_advance_point ();
while (rl_point < rl_end && whitespace (rl_line_buffer[rl_point]))
_rl_vi_advance_point ();
opoint = rl_point;
if (rl_point < rl_end)
{
if (_rl_isident (rl_line_buffer[rl_point]))
do
{
opoint = _rl_vi_advance_point ();
}
while (rl_point < rl_end && _rl_isident (rl_line_buffer[rl_point]));
else
do
{
opoint = _rl_vi_advance_point ();
}
while (rl_point < rl_end && !_rl_isident (rl_line_buffer[rl_point])
&& !whitespace (rl_line_buffer[rl_point]));
}
rl_point = opoint;
}
return (0);
}
int
rl_vi_insert_beg (int count, int key)
{
rl_beg_of_line (1, key);
rl_vi_insert_mode (1, key);
return (0);
}
static void
_rl_vi_append_forward (int key)
{
_rl_vi_advance_point ();
}
int
rl_vi_append_mode (int count, int key)
{
_rl_vi_append_forward (key);
rl_vi_start_inserting (key, 1, rl_arg_sign);
return (0);
}
int
rl_vi_append_eol (int count, int key)
{
rl_end_of_line (1, key);
rl_vi_append_mode (1, key);
return (0);
}
/* What to do in the case of C-d. */
int
rl_vi_eof_maybe (int count, int c)
{
return (rl_newline (1, '\n'));
}
/* Insertion mode stuff. */
/* Switching from one mode to the other really just involves
switching keymaps. */
int
rl_vi_insertion_mode (int count, int key)
{
_rl_keymap = vi_insertion_keymap;
_rl_vi_last_key_before_insert = key;
if (_rl_show_mode_in_prompt)
_rl_reset_prompt ();
return (0);
}
int
rl_vi_insert_mode (int count, int key)
{
rl_vi_start_inserting (key, 1, rl_arg_sign);
return (0);
}
static void
vi_save_insert_buffer (int start, int len)
{
/* Same code as _rl_vi_save_insert below */
if (len >= vi_insert_buffer_size)
{
vi_insert_buffer_size += (len + 32) - (len % 32);
vi_insert_buffer = (char *)xrealloc (vi_insert_buffer, vi_insert_buffer_size);
}
strncpy (vi_insert_buffer, rl_line_buffer + start, len - 1);
vi_insert_buffer[len-1] = '\0';
}
static void
_rl_vi_save_replace (void)
{
int len, start, end;
UNDO_LIST *up;
up = rl_undo_list;
if (up == 0 || up->what != UNDO_END || vi_replace_count <= 0)
{
if (vi_insert_buffer_size >= 1)
vi_insert_buffer[0] = '\0';
return;
}
/* Let's try it the quick and easy way for now. This should essentially
accommodate every UNDO_INSERT and save the inserted text to
vi_insert_buffer */
end = rl_point;
start = end - vi_replace_count + 1;
len = vi_replace_count + 1;
vi_save_insert_buffer (start, len);
}
static void
_rl_vi_save_insert (UNDO_LIST *up)
{
int len, start, end;
if (up == 0 || up->what != UNDO_INSERT)
{
if (vi_insert_buffer_size >= 1)
vi_insert_buffer[0] = '\0';
return;
}
start = up->start;
end = up->end;
len = end - start + 1;
vi_save_insert_buffer (start, len);
}
void
_rl_vi_done_inserting (void)
{
if (_rl_vi_doing_insert)
{
/* The `C', `s', and `S' commands set this. */
rl_end_undo_group ();
/* Now, the text between rl_undo_list->next->start and
rl_undo_list->next->end is what was inserted while in insert
mode. It gets copied to VI_INSERT_BUFFER because it depends
on absolute indices into the line which may change (though they
probably will not). */
_rl_vi_doing_insert = 0;
if (_rl_vi_last_key_before_insert == 'R')
_rl_vi_save_replace (); /* Half the battle */
else
_rl_vi_save_insert (rl_undo_list->next);
vi_continued_command = 1;
}
else
{
if (rl_undo_list && (_rl_vi_last_key_before_insert == 'i' ||
_rl_vi_last_key_before_insert == 'a' ||
_rl_vi_last_key_before_insert == 'I' ||
_rl_vi_last_key_before_insert == 'A'))
_rl_vi_save_insert (rl_undo_list);
/* XXX - Other keys probably need to be checked. */
else if (_rl_vi_last_key_before_insert == 'C')
rl_end_undo_group ();
while (_rl_undo_group_level > 0)
rl_end_undo_group ();
vi_continued_command = 0;
}
}
int
rl_vi_movement_mode (int count, int key)
{
if (rl_point > 0)
rl_backward_char (1, key);
_rl_keymap = vi_movement_keymap;
_rl_vi_done_inserting ();
/* This is how POSIX.2 says `U' should behave -- everything up until the
first time you go into command mode should not be undone. */
if (RL_ISSTATE (RL_STATE_VICMDONCE) == 0)
rl_free_undo_list ();
if (_rl_show_mode_in_prompt)
_rl_reset_prompt ();
RL_SETSTATE (RL_STATE_VICMDONCE);
return (0);
}
int
rl_vi_arg_digit (int count, int c)
{
if (c == '0' && rl_numeric_arg == 1 && !rl_explicit_arg)
return (rl_beg_of_line (1, c));
else
return (rl_digit_argument (count, c));
}
/* Change the case of the next COUNT characters. */
#if defined (HANDLE_MULTIBYTE)
static int
_rl_vi_change_mbchar_case (int count)
{
wchar_t wc;
char mb[MB_LEN_MAX+1];
int mlen, p;
size_t m;
mbstate_t ps;
memset (&ps, 0, sizeof (mbstate_t));
if (_rl_adjust_point (rl_line_buffer, rl_point, &ps) > 0)
count--;
while (count-- && rl_point < rl_end)
{
m = mbrtowc (&wc, rl_line_buffer + rl_point, rl_end - rl_point, &ps);
if (MB_INVALIDCH (m))
wc = (wchar_t)rl_line_buffer[rl_point];
else if (MB_NULLWCH (m))
wc = L'\0';
if (iswupper (wc))
wc = towlower (wc);
else if (iswlower (wc))
wc = towupper (wc);
else
{
/* Just skip over chars neither upper nor lower case */
rl_forward_char (1, 0);
continue;
}
/* Vi is kind of strange here. */
if (wc)
{
p = rl_point;
mlen = wcrtomb (mb, wc, &ps);
if (mlen >= 0)
mb[mlen] = '\0';
rl_begin_undo_group ();
rl_vi_delete (1, 0);
if (rl_point < p) /* Did we retreat at EOL? */
_rl_vi_advance_point ();
rl_insert_text (mb);
rl_end_undo_group ();
rl_vi_check ();
}
else
rl_forward_char (1, 0);
}
return 0;
}
#endif
int
rl_vi_change_case (int count, int ignore)
{
int c, p;
/* Don't try this on an empty line. */
if (rl_point >= rl_end)
return (0);
c = 0;
#if defined (HANDLE_MULTIBYTE)
if (MB_CUR_MAX > 1 && rl_byte_oriented == 0)
return (_rl_vi_change_mbchar_case (count));
#endif
while (count-- && rl_point < rl_end)
{
if (_rl_uppercase_p (rl_line_buffer[rl_point]))
c = _rl_to_lower (rl_line_buffer[rl_point]);